You don't need to do any conversion. Well, to clean things up, you might want to, but it doesn't seem like the problem doesn't require to.

Basically, the main idea here is to find the time it takes for you and your friend to get to the destination. You know velocity = distance / time, so time = distance / velocity. Plug in the individual velocities, and you should find the time in hours. Subtract the time required for you to get to the destination by the time for the friend to get to the destination, and that's how long your friend must wait for you.

I think I have solved this one; It wasn't that hard once I found the right formula -_-

Thanks to both of you guys, you really saved my butt ^_^

I have a bunch of other problems to do though; She was out and gave us a bunch of work and I wasn't there when it was given so I have to do like 25 more...I've only gotten through the first 5...counting this one -_-